Time and potentially some filing/service costs. You may be able to claim some of those as well (When I almost had to sue for a security deposit, in that Jurisdiction I could get some filing fees but not service costs for whatever reason...)

That said, if they don't show up, you'll get a default judgement. And if TM doesn't pay, they can have fun with it if there is an office nearby. A while back someone got a judgement against a bank, they didn't pay out. He came by with the sheriff and they started loading up chairs/etc when they hesitated to cut a check. :)

Or, whatever other 'collection' action you may have to motion for after the fact if they don't pay.